Well this is what I came up with for my first sump rough draft. I feel like I'm going a little baffle crazy, but I think it should still work fine. The sump will be an old school 6ft 125g and it'll be for a stingray tank. Please let me know what you think.
HOB filter sock - Bubble trap - Heater - Flood Barrier - Pump - Bubble trap - Refugium
HOB filter sock - Bubble trap - Heater - Flood Barrier - Pump - Bubble trap - Refugium